Adjustable and changeable weigth training device

ABSTRACT

An adjustable and changeable weight training device includes a top body, an upper body, a collar, at least one weight disk, a lower body, a bottom board and a connection member which is inserted through the parts. The number of the weight disks is adjustable to get a desired weight. The top body can be replaced with other configurations for different purposes, such as a dumbbell, a kettle-shaped dumbbell or a barbell.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a weight training device, and more particularly to a weight training device which is adjustable in weight and changeable in configuration for different purposes.

2. Description of the Prior Art

People always use a dumbbell, a kettle-shaped dumbbell or a barbell for weight training. In general, a conventional weight training device has a single structure and a fixed weight. The user selects a suitable weight training device according to his/her physical capacity. When the weight training device is too light, the user has to buy a heavier one. For the user, the light weigh training device may be useless in the future, which causes a waste of money and occupies space. Besides, conventional weight training devices, such as dumbbells, kettle-shaped dumbbells, and barbells, have different structures. If these devices are needed, the user has to buy all of them. Furthermore, for the makers and sellers, various dumbbells in different weights and structures occupy a lot of space and increase cost. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to improve the aforesaid problems of the conventional weight training devices.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide an adjustable and changeable weight training device, which is adjustable in weight with a single structure for the demand of the user.

Another object of the present invention is to provide an adjustable and changeable weight training device, which can be used as a dumbbell, a kettle-shaped dumbbell or a barbell by changing the configuration of a top body.

In order to achieve the aforesaid objects, the present invention comprises a top body, an upper body, at least one weight disk, a lower body and a connection member; the top body having a post extending downward from a central portion thereof, the post having a central threaded hole; the upper body being located under the top body, the upper body having a central through hole for insertion of the post of the top body; the weight disk having a ring shape and being located under the top body, the weight disk having a central through hole; the lower body being located under the weight disk, the lower body having a central through hole corresponding to the central through hole of the weight disk; the connection member comprising a threaded body, the threaded body being inserted through the lower body and the weight disk and screwed to the threaded hole of the top body.

The weight of the weight training device can be adjusted for different users, and the configuration of the weight training device can be changed for different purposes. The present invention is cost-effective.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a partially exploded bottom view of the present invention;

FIG. 4 is a cross-sectional view of the present invention;

FIG. 5 is a cross-sectional view of the present invention showing that some weight disks are taken out;

FIG. 6 is a cross-sectional view of FIG. 5;

FIG. 7 is schematic view to show that the connection member is pressed and engaged;

FIG. 8 is an exploded view of the present invention to be changed as a dumbbell; and

FIG. 9 is an exploded view of the present invention to be changed as a barbell.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 4, the adjustable and changeable weight training device of the present invention comprises a top body 1, an upper body 2, a collar 3, at least one weight disk 4, a lower body 5, a bottom board 6 and a connection member 7.

The top body 1 is located at a top end of the weight training device. The top body 1 can have one or more embodiment. In this embodiment, the weight training device is used as a dumbbell. The top body 1 has a post 11 extending downward from a central portion thereof. The post 11 is hollow and has a taper shape. The post 11 has a central threaded hole 13. The top body 1 further comprises a pair of engaging portions 12 transversely extending from two sides of the post 11 and a handle 14 extending upward from the pair of engaging portions 12.

The upper body 2 is located under the top body 1. The upper body 2 has a central through hole 21 which has a funnel shape. The central through hole 21 is adapted for insertion of the post 11 of the top body 1. The upper body 2 has a pair of engaging recesses 22 at two sides of the central through hole 21. The pair of engaging recesses 22 is adapted to accommodate the pair of engaging portions 12 of the top body 1. The upper body 2 further has a smooth top curved surface 23 for the wrist of a user to lean thereon. The upper body 2 has a bottom formed with chamber 24.

The collar 3 is substantially in a ring shape and located in the chamber 24 of the upper body 2. The collar 3 has a central through hole 31 and a pair of recesses 32 at two sides of the central through hole 31. The pair of recesses 32 corresponds in shape to the pair of engaging recesses 22.

The weight disk 4 has a ring shape and is located under the top body 2 and the collar 3. The number of the weight disks 4 is adjustable. The weight disk 4 has a central through hole 41 corresponding to the central through hole 31 of the collar 3. The weight disk 4 has a concave portion 42 around the central through hole 41 and a raised ring 43 around the concave portion 42. The bottom of the weight disk 4 has a convex ring 44 corresponding to the raised ring 43. The convex ring 44 is to accommodate the raised ring 43 of another underneath weight disk 4 when two weight disks 4 are stacked together, which facilitates the alignment and positioning of the upper and lower weight disks 4 and to diminish the structural stress when in use.

The lower body 5 is located under the lowest weight disk 4. The configuration of the lower body 5 is similar to that of the weight disk 4. The lower body 5 has a central through hole 51 corresponding to the central through hole 41 of the weight disk 4. The lower body 5 has a concave portion 52 around the central through hole 51 and a raised ring 53 around the concave portion 52. The bottom of the lower body 5 has a chamber 54 and an annular rib 541 in the chamber 54. The annular rib 541 has a reduced outer side.

The bottom board 6 is a flat board and has a central through hole 61. The bottom board 6 is located in the annular rib 541 at the bottom of the lower body 5. The bottom board 6 has a bottom surface which is provided with radial non-skid portions 62.

The connection member 7 comprises a threaded body 71 and a positioning board 73. The threaded body 71 is screwed to the threaded hole 13 of the top body 1. The positioning board 73 is pivotally connected to the threaded body 71 with a pivot member 72. The positioning board 73 can be turned relative to the threaded body 71.

The top body 1, the upper body 2, the collar 3, the weight disk 4, the lower body 5 and the bottom board 6 are stacked one by one, and then the threaded body 71 of the connection member 7 is inserted through the through holes of the parts and locked to the threaded hole 13, so that the present invention is assembled, as shown in FIG. 1 and FIG. 4.

When the user wants to have a light kettle-shaped dumbbell, the connection member 7 is unscrewed to take out one or more weight disk 4 as shown in FIG. 5, and then the connection member 7 is screwed to the threaded hole 73 again as shown in FIG. 6. After assembly, the positioning board 73 is turned sideward so that the positioning board 73 is completely accommodated in the chamber 54, not protruding out of the chamber 54. The radial non-skid portions 62 provide a better engaging capacity to the positioning board 73, preventing the positioning board 73 from disengagement.

Preferably, the lower body 5 is made of a soft material, avoiding any damage to a floor or a tabletop and any noise when the weight training device is placed and providing a non-skid function.

The collar 3 is not a required part, depending on the weight.

In this embodiment, the length of the connection member 7 can be in different sizes according to the number of the weight disks 4. In the drawings, the length of the connection member 7 is used for three weight disks. If five weight disks 4 are needed, the length of the connection member must be lengthened.

As shown in FIG. 7, the cross-section of the connection member 7 is non-circular and non-isometric, such that the connection member 7 is not easy to be lifted after the connection member 7 is pressed and engaged, enhancing the engagement of the connection member 7 and the threaded hole 13.

The aforesaid embodiment of the weight training device is a kettle-shaped dumbbell. FIG. 8 and FIG. 9 show different embodiments of the present invention. As shown in FIG. 8, the weight training device is a dumbbell. As shown in FIG. 9, the weigh training device is a barbell. The top body 8 doesn't have a handle. The top body 8 has a rod which extends from one end of the post 83 and is coaxial with the post 83. The two sides of the post 83 also have the engaging portions 12. The post 83 has the threaded hole 13. When the rod is a short rod 84, the weight training device is a dumbbell. Two sides of the rod 84 are respectively connected with the upper body 2, the weight disk4, the lower body 5, the base board 6 and the connection member 7 in sequence. When the rod is a long rod 85, the weight training device is a barbell, as shown in FIG. 9.

By the post 11 and the threaded hole 13 of the top body 1, the upper body 2, the weight disk 4, the lower body 5, the bottom board 6 and the connection member 7 incorporated with the changeable top body 1, the weight training device of the present invention can be used for different purposes,

Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims. 

1. An adjustable and changeable weight training device, comprising a top body, an upper body, at least one weight disk, a lower body and a connection member; the top body having a post extending downward from a central portion thereof, the post having a central threaded hole; the upper body being located under the top body, the upper body having a central through hole for insertion of the post of the top body; the weight disk having a ring shape and being located under the top body, the weight disk having a central through hole; the lower body being located under the weight disk, the lower body having a central through hole corresponding to the central through hole of the weight disk; the connection member comprising a threaded body, the threaded body being inserted through the lower body, the weight disk and the upper body and screwed to the threaded hole of the top body.
 2. The adjustable and changeable weight training device as claimed in claim 1, wherein the top body further comprises a pair of engaging portions transversely extending from two sides of the post and a handle extending upward from the pair of engaging portions, and the upper body has a pair of engaging recesses at two sides of the central through hole of the upper body to accommodate the pair of engaging portions of the top body.
 3. The adjustable and changeable weight training device as claimed in claim 1, wherein the upper body has a bottom formed with a chamber to accommodate a collar, the collar has a ring shape and comprises a central through hole and a pair of recesses at two sides of the central through hole of collar.
 4. The adjustable and changeable weight training device as claimed in claim 1, wherein the weight disk has a concave portion around the central through hole of the weight disk and a raised ring around the concave portion, a bottom of the weight disk has a convex ring corresponding to the raised ring.
 5. The adjustable and changeable weight training device as claimed in claim 4, wherein the lower body has a concave portion around the central through hole of the lower body and a raised ring around the concave portion of the lower body, a bottom of the lower body has a chamber and an annular rib in the chamber, the annular rib has a reduced outer side, a bottom board is a flat board and has a central through hole, the bottom board is located in the annular rib at the bottom of the lower body.
 6. The adjustable and changeable weight training device as claimed in claim 5, wherein the bottom board has a bottom surface which is provided with radial non-skid portions.
 7. The adjustable and changeable weight training device as claimed in claim 1, wherein the connection member further comprises a positioning board, the positioning board is pivotally connected to the threaded body with a pivot member so that the positioning board is able to be turned relative to the threaded body.
 8. The adjustable and changeable weight training device as claimed in claim 1, wherein the lower body is made of a soft material.
 9. The adjustable and changeable weight training device as claimed in claim 1, wherein the top body has a rod extending from one end of the post and being coaxial with the post, an opposing end of the rod is connected with another top body, another upper body, another one or more weight disk, another lower body, another the connection member.
 10. The adjustable and changeable weight training device as claimed in claim 9, wherein the upper body has a pair of engaging recesses at two sides of the central through hole of the upper body to accommodate the pair of engaging portions of the top body. 